Title :
VLSI Implementation for Portable Application Oriented MPEG-4 Audio Codec
Author :
Liu, Peilin ; Liu, Lingzhi ; Deng, Ning ; Fu, Xuan ; Liu, Jiayan ; Liu, Qianru ; Zhang, Guocheng ; He, Bin
Author_Institution :
Dept. of Electron. Eng., Shanghai Jiaotong Univ.
Abstract :
In this paper, we present an audio codec for portable application, which supports MPEG-2/MPEG-4 AAC LC profile. The presented codec has been implemented using UMC/HJTC 0.18mum CMOS technology. In this implementation, optimized algorithms are developed and most memory and calculation units are shared between encoder and decoder so that the features of low power and low cost are achieved. The codec uses a total of 160k gates, 21KB RAM and 1.7KB ROM. Experiment shows that it is capable of real-time encoding/decoding AAC streams at only 5MHz working frequency. The codec´s interface is simple so that it can be reused as IP macro and easily embedded into various multimedia systems
Keywords :
CMOS integrated circuits; VLSI; audio coding; codecs; 0.18 micron; 1.7 kbit; 21 kbit; 5 MHz; CMOS technology; MPEG-2 AAC LC profile; MPEG-4 AAC LC profile; MPEG-4 audio codec; RAM; ROM; VLSI implementation; decoder; encoder; portable application; real-time decoding; real-time encoding; CMOS technology; Codecs; Cost function; Decoding; Encoding; MPEG 4 Standard; Random access memory; Read only memory; Read-write memory; Very large scale integration;
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
DOI :
10.1109/ISCAS.2007.378001
